package chat

import (
	"errors"
	"strings"
	"testing"
	"time"

	"hfb_sys/backend/internal/model"

	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

func setupQrCodeTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	if err != nil {
		t.Fatalf("无法创建测试数据库: %v", err)
	}
	if err := db.AutoMigrate(&model.ChatQrCode{}, &model.ChatConversation{}, &model.SystemConfig{}); err != nil {
		t.Fatalf("数据库迁移失败: %v", err)
	}
	return db
}

func TestGetQrCodeOCRConfigReadsSystemConfig(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	rows := []model.SystemConfig{
		{Key: qrCodeOCRTokenConfigKey, Value: "test-token"},
		{Key: qrCodeOCRJobURLConfigKey, Value: "https://example.test/ocr/jobs"},
		{Key: qrCodeOCRModelConfigKey, Value: "PaddleOCR-Test"},
	}
	if err := db.Create(&rows).Error; err != nil {
		t.Fatalf("创建系统配置失败: %v", err)
	}

	config, err := repo.GetQrCodeOCRConfig(t.Context())
	if err != nil {
		t.Fatalf("读取 OCR 配置失败: %v", err)
	}
	if config.Token != "test-token" {
		t.Fatalf("token = %q", config.Token)
	}
	if config.JobURL != "https://example.test/ocr/jobs" {
		t.Fatalf("job_url = %q", config.JobURL)
	}
	if config.Model != "PaddleOCR-Test" {
		t.Fatalf("model = %q", config.Model)
	}
}

func TestListQrCodesIncludesBoundConversationTitle(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	conversation := model.ChatConversation{
		Title:  "账号群 L202606180001",
		Type:   ConversationTypeListingGroup,
		Status: "active",
	}
	if err := db.Create(&conversation).Error; err != nil {
		t.Fatalf("创建群聊失败: %v", err)
	}

	qrcode := model.ChatQrCode{
		ImageURL:       "/api/files/object?key=qrcode/group.png",
		GroupName:      "王大锤-鼠鼠跑刀一群",
		Status:         QrCodeStatusUsed,
		ConversationID: &conversation.ID,
		CreatedBy:      1,
	}
	if err := db.Create(&qrcode).Error; err != nil {
		t.Fatalf("创建二维码失败: %v", err)
	}

	items, total, err := repo.ListQrCodes(t.Context(), QrCodeListRequest{Page: 1, Limit: 20})
	if err != nil {
		t.Fatalf("查询二维码失败: %v", err)
	}
	if total != 1 || len(items) != 1 {
		t.Fatalf("total = %d, len = %d, want 1", total, len(items))
	}
	if items[0].GroupName != "王大锤-鼠鼠跑刀一群" {
		t.Fatalf("群名 = %q", items[0].GroupName)
	}
	if items[0].BoundConversationTitle != "账号群 L202606180001" {
		t.Fatalf("绑定群名 = %q", items[0].BoundConversationTitle)
	}
}

func TestParseQrCodeGroupNameCandidates(t *testing.T) {
	rawText := strings.Join([]string{
		"使用微信或企业微信扫码加入",
		"王大锤-鼠鼠跑刀一群",
		"这二维码7天内有效",
	}, "\n")

	candidates := parseQrCodeGroupNameCandidates(rawText)
	if len(candidates) == 0 {
		t.Fatal("未解析出群名候选")
	}
	if candidates[0] != "王大锤-鼠鼠跑刀一群" {
		t.Fatalf("首个候选 = %q", candidates[0])
	}
}

func TestUpdateQrCodeRejectsUsedToUnused(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	now := time.Date(2026, 6, 18, 12, 0, 0, 0, time.UTC)
	conversationID := uint64(1001)
	qrcode := model.ChatQrCode{
		ImageURL:       "/api/files/object?key=qrcode/used.png",
		Status:         QrCodeStatusUsed,
		ConversationID: &conversationID,
		UsedAt:         &now,
		CreatedBy:      1,
	}
	if err := db.Create(&qrcode).Error; err != nil {
		t.Fatalf("创建二维码失败: %v", err)
	}

	status := QrCodeStatusUnused
	err := repo.UpdateQrCode(t.Context(), qrcode.ID, UpdateQrCodeRequest{Status: &status})
	if !errors.Is(err, ErrQrCodeCannotReenable) {
		t.Fatalf("error = %v, want ErrQrCodeCannotReenable", err)
	}

	var saved model.ChatQrCode
	if err := db.First(&saved, qrcode.ID).Error; err != nil {
		t.Fatalf("查询二维码失败: %v", err)
	}
	if saved.Status != QrCodeStatusUsed {
		t.Fatalf("二维码状态 = %q, want %q", saved.Status, QrCodeStatusUsed)
	}
}

func TestUpdateQrCodeRejectsIssuedDisabledToUnused(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	conversationID := uint64(1002)
	qrcode := model.ChatQrCode{
		ImageURL:       "/api/files/object?key=qrcode/disabled.png",
		Status:         QrCodeStatusDisabled,
		ConversationID: &conversationID,
		CreatedBy:      1,
	}
	if err := db.Create(&qrcode).Error; err != nil {
		t.Fatalf("创建二维码失败: %v", err)
	}

	status := QrCodeStatusUnused
	err := repo.UpdateQrCode(t.Context(), qrcode.ID, UpdateQrCodeRequest{Status: &status})
	if !errors.Is(err, ErrQrCodeCannotReenable) {
		t.Fatalf("error = %v, want ErrQrCodeCannotReenable", err)
	}
}

func TestUpdateQrCodeAllowsUnusedToDisabled(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	qrcode := model.ChatQrCode{
		ImageURL:  "/api/files/object?key=qrcode/unused.png",
		Status:    QrCodeStatusUnused,
		CreatedBy: 1,
	}
	if err := db.Create(&qrcode).Error; err != nil {
		t.Fatalf("创建二维码失败: %v", err)
	}

	status := QrCodeStatusDisabled
	if err := repo.UpdateQrCode(t.Context(), qrcode.ID, UpdateQrCodeRequest{Status: &status}); err != nil {
		t.Fatalf("更新二维码失败: %v", err)
	}

	var saved model.ChatQrCode
	if err := db.First(&saved, qrcode.ID).Error; err != nil {
		t.Fatalf("查询二维码失败: %v", err)
	}
	if saved.Status != QrCodeStatusDisabled {
		t.Fatalf("二维码状态 = %q, want %q", saved.Status, QrCodeStatusDisabled)
	}
}

func TestUpdateQrCodeGroupNameAndRenameFlag(t *testing.T) {
	db := setupQrCodeTestDB(t)
	repo := NewRepository(db, nil)
	qrcode := model.ChatQrCode{
		ImageURL:  "/api/files/object?key=qrcode/unused.png",
		Status:    QrCodeStatusUnused,
		CreatedBy: 1,
	}
	if err := db.Create(&qrcode).Error; err != nil {
		t.Fatalf("创建二维码失败: %v", err)
	}

	groupName := "王大锤-鼠鼠跑刀一群"
	renamed := true
	if err := repo.UpdateQrCode(t.Context(), qrcode.ID, UpdateQrCodeRequest{
		GroupName:    &groupName,
		WecomRenamed: &renamed,
	}); err != nil {
		t.Fatalf("更新二维码失败: %v", err)
	}

	var saved model.ChatQrCode
	if err := db.First(&saved, qrcode.ID).Error; err != nil {
		t.Fatalf("查询二维码失败: %v", err)
	}
	if saved.GroupName != groupName {
		t.Fatalf("群名 = %q, want %q", saved.GroupName, groupName)
	}
	if !saved.WecomRenamed {
		t.Fatal("企微改名标记未保存")
	}
}